Logic would say that, just because we live on a planet, that - Help.com

I think it is more statistics rather than logic.

It’s considered mathematically impossible for life on earth to be the only sentient life in the universe. They’ve known this for quite a while.

Moreso, if there were a hypothetical planet with EXACTLY the same conditions, terrain and environment as earth; logic would dictate that life would follow the exact same evolutionary process. The chances of that happening in reality are astronomical though - but it is theoretically possible that we’re not the only human race in the universe. Interesting thought.

It’s statistically improbable; not impossible that Earth is the only planet inhabitant with life forms. It is not definite that life does exist elsewhere simply for the fact that we have never observed it. All we can ever say until we observe life elsewhere is to say that it is very probable it exists.

fractal.scatter wrote:
It’s statistically improbable; not impossible that Earth is the only planet inhabitant with life forms. It is not definite that life does exist elsewhere simply for the fact that we have never observed it. All we can ever say until we observe life elsewhere is to say that it is very probable it exists.

They’ve observed it on Mars and Titan, microscopic though it may be.

Shepherd wrote:
They’ve observed it on Mars and Titan, microscopic though it may be.

No they haven’t. They’ve observed many phonemena and conditions that indicate life may have been present. They still have not observed any life yet or have overwhelming evidence that it once existed. Other than the fact that it was possible (on Mars at least).

Apologies about Mars, they found evidence of life as you said; I was remembering it wrong. It wasn’t Titan either, it was Enceladus:

http://www.space.com/scienceastronomy…

But they think fishlike lifeforms are living on Titan. I’m trying to find the article on that.

What’s your point? Logic tells me we are not the only life form in the universe, intelligent or otherwise. We’re still undecided about the intelligent part.

Yeah Enceladus adds itself to somewhere else in the Solar System where microscopic life can be found. I think the best chances for macroscopic life are Europa and Ganymede (and possibly Callisto).

The Saturnian system has proved much more interesting than imagined as a result of the Cassini mission. I am still very sure that the guys at Imperial don’t beleive there to be life though.

I’m just recalling what I’ve read on the topic before. The Fish theory was undoubtedly American. But its all a step forward from the earlier believe that life could only possibly exist on Earth.